i think you should wait till summer and then get the shrimp. in the meantime just let things establish and grow out. maybe put in a snail that wont breed to build and keep some degree of bioload. but even if you dont, you'll likely have worms and other animals in the bowl once you fill it, so its no big deal.
cherry shrimp are great for this.
and yes i'd scrap some of the stem plants and do blyxa instead. it will look great there!